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ASTM G 32 Document Information:
Title
Standard Test Method for Cavitation Erosion Using Vibratory Apparatus
ASTM International
Publication Date:
Dec 1, 2006
Scope:
This test method produces cavitation damage on the face of a
specimen vibrated at high frequency while immersed in a liquid. The
vibration induces the formation and collapse of cavities in the
liquid, and the collapsing cavities produce the damage to and
erosion (material loss) of the specimen.
Although the mechanism for generating fluid cavitation in this
method differs from that occurring in flowing systems and hydraulic
machines (see 5.1), the nature of the material damage mechanism is
believed to be basically similar. The method therefore offers a
small-scale, relatively simple and controllable test that can be
used to compare the cavitation erosion resistance of different
materials, to study in detail the nature and progress of damage in
a given material, or—by varying some of the test conditions—to
study the effect of test variables on the damage produced.
This test method specifies standard test conditions covering the
diameter, vibratory amplitude and frequency of the specimen, as
well as the test liquid and its container. It permits deviations
from some of these conditions if properly documented, that may be
appropriate for some purposes. It gives guidance on setting up a
suitable apparatus and covers test and reporting procedures and
precautions to be taken. It also specifies standard reference
materials that must be used to verify the operation of the facility
and to define the normalized erosion resistance of other test
materials.
The values stated in SI units are to be regarded as standard.
The inch-pound units given in parentheses are for information
only.
This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. For specific safety precautionary
information, see 6.1, 10.3, and 10.6.1.
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